(c) Ukraine’s Mariyano Rajoy has assumed the office of Prime Minister on December 20, 2011.Ukraine is a large country in Eastern Europe known for its Orthodox churches, Black Sea coastline and forested mountains.Its capital, Kiev, features the gold domed St. Sophia's Cathedral, with11th-century mosaics and frescoes.Presently, Volodymyr Groysman is the Prime Minister of Ukraine.